XML 54 R45.htm IDEA: XBRL DOCUMENT v3.22.2
Earnings per Share - Components of Basic and Diluted Earnings Per Share (Detail) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Mar. 31, 2022
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2022
Jun. 30, 2021
Earnings Per Share [Abstract]            
Net (loss) income attributable to common stockholders $ (4.0) $ 36.0 $ 44.0 $ 53.0 $ 32.0 $ 97.0
Weighted average outstanding shares of common stock (in shares) 103.5   109.0   104.2 108.9
Dilutive effect of employee stock options, restricted stock and other stock awards (in shares) 0.0   3.7   2.9 3.8
Common stock and common stock equivalents (in shares) 103.5   112.7   107.1 112.7
Net (loss) income per share:            
Basic (in dollars per share) $ (0.04)   $ 0.40   $ 0.31 $ 0.89
Diluted (in dollars per share) $ (0.04)   $ 0.39   $ 0.30 $ 0.86
Earnings Per Share, Diluted [Abstract]            
Antidilutive securities excluded from computation of EPS, value $ 105.6          
Antidilutive options to purchase that were not included in the computation of diluted earnings per share (in shares) 0.4   0.2   0.4 0.6